JP2023001327A - Flush toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet bowl with improved water saving performance and capable of preventing adhesion of dirt to the upper edge of a rim part thereby reducing the number of times of cleaning, while having high designability and cleaning friendliness of the rim part even when the rim part does not have an overhang.

SOLUTION: There is provided a flush toilet bowl with which flushing water supply means supplies flushing water to clean a bowl part and discharge sewerage with the flushing water comprising: a bowl part having a bowl-shaped sewerage receiving face and a rim part erected in a substantially vertical direction on the inside upper end thereof; a water reservation part and a drain pipe connection port provided on the lower part of the bowl part; and a rim water discharge part discharging the flushing water along the inner peripheral surface of the rim part. A rim water discharge port which constitutes the rim discharge part is configured to discharge less amount of the flushing water to the upper part of the rim part per unit time than to the lower part thereof.

SELECTED DRAWING: Figure 5

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a flush toilet, and more particularly to a flush toilet in which flush water is supplied to a rim portion formed on the periphery of the upper end of a bowl portion, and the flush water swirls around the rim portion and the bowl portion to flush the toilet. .

2. Description of the Related Art Conventionally, flush toilets have been known in which flush water is supplied to the inner peripheral surface of a rim portion formed on the periphery of the upper end of the toilet bowl, and the flush water swirls around the bowl portion to flush the toilet bowl. (For example, see Patent Document 1)
In the flush toilet described in Patent Document 1, the flush water supplied from the tank passes through the rim conduit and flows from the rim spout provided on one side of the rim formed on the upper edge of the bowl to the rim. Washing water is being sprayed toward the The rim wash water spouted from the rim spout rotates around the rim portion while being prevented from falling onto the upper surface of the shelf provided in the bowl portion. The washing water swirls to clean the bowl by falling into the bowl.
Further, in Patent Document 1, the rim portion is configured without an overhang that covers the shelf portion. As a result, we are aiming for a clean and sophisticated design and easy cleaning of the rim.

Japanese Patent Application Laid-Open No. 2005-98005

However, in recent years, there has been an increasing demand for water saving in flush toilet bowls, and there has been a problem that the rim portion having no overhang as in Patent Document 1 is difficult to cope with water saving. Specifically, since there is no overhang, if the flow rate of the cleaning water supplied to the rim is increased, the cleaning water will be ejected from the rim due to the action of centrifugal force. There is a limit to increasing the flow rate of the flushing water, and if the flow rate of the flushing water is kept low, the ability to clean the toilet will be reduced. It was difficult to deal with.
In addition, if the rim does not have an overhang, if the wash water is pushed to the upper edge of the upper inner part of the rim, there is a risk that the wash water will run out of the rim due to changes in factors such as pressure fluctuations. Therefore, there is a problem that the upper edge of the rim cannot be attacked, and dirt remains on the upper edge of the rim. Therefore, even if the overhang-less rim can be cleaned easily, dirt remains on the upper edge of the rim. There was a problem that it increased more than the toilet bowl.

Therefore, the present invention has been made to solve the problems of the prior art, and even if the rim portion has no overhang, it maintains the advantages of high designability and easy cleaning of the rim portion. To provide an excellent flush toilet capable of realizing high water saving, which is a problem in this type of toilet bowl, and also preventing the adhesion of dirt to the upper edge of the rim, and reducing the frequency of cleaning the rim. for the purpose.

In order to achieve the above object, the present invention provides a flush toilet for supplying flush water from a flush water supply means to wash the bowl of the toilet bowl to discharge the waste, in which a bowl-shaped waste receiving surface is provided. , and a bowl portion provided with a rim portion erected in a substantially vertical direction at the inner upper end portion, a water storage portion and a drain pipe connection port provided at the bottom of the bowl portion, and on the inner peripheral surface of the rim portion a rim water spouting portion that spouts cleansing water along the rim portion, wherein the rim spouting port constituting the rim water spouting portion is such that the discharge flow rate per unit time of cleansing water to the upper portion of the rim portion is less than that to the lower portion of the rim portion. It is characterized in that it is configured to be less than the discharge flow rate of washing water per unit time.

In the present invention configured as described above, even if the rim portion is configured without an overhang, the flow rate of the wash water swirling on the upper side of the rim portion is kept low, so the centrifugal force accompanying the swirling acts. Even so, it is not greatly affected by it, and the risk of washing water splashing out from the rim can be reduced, so the washing water discharge speed from the rim spout can be increased, and high washing power can be secured. This has made it possible to ensure high water-saving performance.
In addition, compared to the inside of the bowl and the lower part of the rim, the upper part of the rim is less likely to get dirty due to splashed urine, etc., and the dirt intensity is low. It was able to maintain its performance. In this way, it is possible to secure high washability, which was a problem in the overhang-less rim portion, with a simple structure.
Furthermore, in the present invention, the flow rate ratio is changed in the vertical direction of the rim portion to increase the flow rate on the lower side. In the present invention, this falling force is actively utilized to act to pull down the wash water on the upper side. As a result, it is possible to reliably prevent the washing water from jumping out due to the increased discharge flow rate. Furthermore, not only is it possible to prevent the washing water from jumping out of the rim, but it is also possible to allow the washing water to reach the upper edge of the rim. Specifically, the effect of centrifugal force was reduced by reducing the flow rate. Furthermore, the falling force of the wash water on the lower side, which has a larger flow rate, falling to the bowl side acted on the wash water on the upper side as a pull-down force that counteracts the centrifugal force. As a result, the washing water from the upper part of the rim does not jump out of the rim, and even if the washing water reaches the upper edge of the rim, this force pulls the washing water back to the rim. It is now possible to easily reach the washing water. It is now possible to reliably prevent poor cleaning of the upper edge of the rim, which has been a problem with rims that do not have overhangs, making it possible to drastically reduce the number of cleanings.

Further, according to the present invention, the rim water spouting portion is configured to supply cleansing water to the rim portion from a single spouting port, and the upper portion of the rim spouting portion is configured to form a thin film of water on the upper side of the rim portion. The length of the spout in the vertical direction is longer than the length in the width direction, and the length in the width direction is substantially uniform in the vertical direction, and the lower spout supplies cleansing water to the lower portion of the rim portion. is characterized in that the discharge flow rate per unit time of wash water to the lower side of the rim portion is greater than that of the upper spout.

In the present invention constructed in this manner, it is possible to reliably make the washing water jetted upwardly of the rim portion thin. As a result, not only can the influence of centrifugal force be reduced by reducing the mass, but also the influence of the pull-down force that counteracts the centrifugal force generated by the washing water at the bottom of the rim dropping to the bottom of the bowl can be ensured. It is possible to reliably prevent the splashing of cleansing water from the rim, and even if the cleansing water reaches the upper edge of the rim, the effect of splashing cleansing water can be reliably prevented. It is a thing.

Furthermore, the present invention is characterized in that the rim spout consisting of the upper spout and the lower spout is formed in an L shape when viewed from the front.

In the present invention configured as described above, the rim spouting port constituting the rim spouting portion is simply configured to be L-shaped, thereby suppressing the spouting flow rate of water spouted to the upper portion of the rim portion and increasing the flow rate of the lower portion. At the same time, it is possible to form a thin film of water on the upper part of the rim.

Furthermore, in the present invention, since the wash water having a large flow rate on the lower side of the rim portion falls to the lower side of the bowl portion, it is prevented from moving toward the wash water side formed by the thin water film on the upper side of the rim portion. In addition, the shelf is formed so as to resist the centrifugal force acting on the thin film of water and to counteract the force of washing water with a large flow rate in the lower portion of the rim portion falling to the lower side of the bowl portion. .

In the present invention configured as described above, the washing water discharged above the rim portion is not only made thin so as not to flow out from the rim portion, but also the flow rate of the lower portion is increased, and the washing water in the lower portion is discharged into the bowl. By skillfully dropping the water onto the rim, the wash water on the upper part of the rim part is pulled down to the lower part, making it possible for the wash water to jump out from the rim part and reach the upper edge of the rim part. Furthermore, in the present invention, the drop control of the wash water to the bowl portion at the lower portion of the rim portion is configured by the shelf portion, so that the desired action can be realized with a simple configuration. In particular, various means such as the shape of the bowl and the frictional force and inclination of the shelf are conceivable to achieve this effect. was very difficult. In the present invention, by realizing this with the width of the shelf, it is possible to provide a flush toilet that can reliably provide the intended effect even with ceramics that have loose dimensional accuracy, and it is said that the production yield can be increased. It can produce an excellent effect in practical use.

Further, in the present invention, the ledge is configured such that the width of the horizontal ledge is smaller at a position farther from the rim spout than in the vicinity of the rim spout, and the width of the horizontal ledge is zero at a farther position. It is characterized by being configured as follows.

With such a simple configuration of the shelf portion, a force countering the centrifugal force can be reliably applied to the thin film of water, and the upper edge of the rim portion can be reliably washed. It is possible to reliably prevent the splashing of washing water.

According to the flush toilet bowl of the present invention, even if the rim portion has no overhang, it maintains the advantages of high designability and easy cleaning of the rim portion, but there are problems with this type of toilet bowl. A high water-saving property can be achieved, and furthermore, the adhesion of dirt to the upper edge of the rim portion can be prevented, and the number of times of cleaning the rim portion can be reduced.

1 is a plan view showing a flush toilet according to an embodiment of the present invention; FIG. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1; FIG. 2 is a sectional view (a water storage tank is omitted) seen along line III-III in FIG. 1; 2 is a partial cross-sectional view taken along line IV-IV of FIG. 1; FIG. FIG. 5 is an image diagram showing a change in the shape of cleansing water spouted from the first spout 18;

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, the basic structure of a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. Here, FIG. 1 is a plan view showing the flush toilet according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II--II in FIG. 1, and FIG. FIG. 4 is a cross-sectional view along line III-III (a water storage tank is omitted), and FIG. 4 is a partial cross-sectional view along line IV-IV of FIG.

As shown in FIGS. 1 to 4, the flush toilet bowl 1 according to the present embodiment is made of ceramic with a glaze layer formed on the surface, and has a skirt portion 2 formed at the bottom and a bowl at the front of the upper half. A portion 4 is formed, and a water conduit 6 is formed in the rear upper part, and a drainage channel 8 for discharging waste by a siphon action is formed in the rear lower part. Furthermore, a water storage tank 10 that communicates with the water conduit 6 is provided at the upper rear portion of the flush toilet bowl 1 . A drain valve 11 is provided in the water storage tank 10 and is opened and closed by an operation lever (not shown). It should be noted that the present invention is applicable not only to a flush toilet equipped with a water storage tank, but also to a flush toilet using the pressure of tap water, for example, equipped with a flush valve.

The bowl portion 4 has a bowl-shaped dirt receiving surface 12 , a rim portion 14 forming an upper edge, and a shelf portion 16 formed between the dirt receiving surface 12 and the rim portion 14 . Here, the inner side surface 14a of the rim portion 14 is formed by a flat surface (smooth plane) extending substantially vertically from the shelf portion 16 so that there is no blind spot when viewed from above. The rim portion 14 is configured as a so-called overhang-less rim portion 14, which provides effects such as a clean and high-quality design, good wiping ability, and resistance to staining.

An entrance 8a of a drainage channel 8 is opened at the center of the filth receiving surface 5 of the bowl portion 4 and below the surface of the pooled water. A passage (vertical pipe) 8c is continuous, and the lower end of the descending passage 8c is connected to a discharge pipe (not shown) via a joint (not shown).

In addition, on the left rear side of the bowl portion 4 of the flush toilet 1 as seen from the front, there is a first water outlet 18 that spouts cleansing water onto the shelf portion 16, and on the right side of the bowl portion 4 as seen from the front. A second water outlet 20 for discharging cleansing water is formed on the shelf 16 on the rear side. counterclockwise).

Furthermore, the bowl portion 4 of the flush toilet 1 is provided with a slit-shaped side at a position above the position of the stagnant water surface of the bowl portion 4 and below the shelf portion 16 and on the left side (bow portion side surface) as viewed from the front. A jet hole 22 is formed. The washing water spouted from the side jet hole 22 flows toward the inlet 8a of the drainage channel 8, effectively pushing the waste into the drainage channel 8. - 特許庁

The water conduit 6 supplies flush water to three water conduits toward the front of the toilet bowl, that is, a first water conduit 24 that supplies flush water to the first water spout 18 and a second water spout 20. The second water passage 26 branches into a third water passage 28 that supplies wash water to the side jet hole 22 . Although effective washing is possible when side jet holes are formed, washing water is discharged onto the shelf 16 only from the first water discharge port 18 and the second water discharge port 20. The jet hole may not be provided.

Next, referring to FIG. 5 in addition to FIGS. 1 to 4, the detailed structure of the first spout 18 of the flush toilet 1 according to this embodiment will be described. The first water outlet 18 is the most characteristic part of the present invention, and the shape of the first water outlet 18 is formed in a substantially L shape. Furthermore, the first water discharge port 18 is composed of an upper water discharge port 18a extending vertically along the rim portion 14 and a lower water discharge port 18b extending laterally along the shelf portion 16, The upper water outlet 18a and the lower water outlet 18b constitute one first water outlet 18. As shown in FIG. In this embodiment, the first spout 18 is formed by forming an opening in the pottery forming the rim portion 14. However, the position and shape of the upper spout 18a and the dimensional accuracy in the width direction are is important in terms of reliably forming a thin film of water along the rim portion 14. Therefore, the first spout 18 may be formed of a resin component in such a way as to be incorporated into the pottery, or the pottery itself may have a large opening. may be opened, a nozzle may be provided at the tip of the hose inside, and the nozzle may constitute the first water outlet. In any case, it is important to ensure dimensional accuracy and positional accuracy.
Also, in this embodiment, only the first spout 18 is formed in an L shape, but it is more preferable to form the second spout 20 in a similar L shape. In addition, when configuring the second spout 20 in an L-shape, even if it is made of ceramics, the second spout 20 may be formed of resin parts in such a way as to be incorporated into the pottery, or the pottery itself may be large. An opening may be opened, a nozzle may be provided at the tip of a hose inside, and the second spout 20 may be formed in this nozzle.

Further, the upper water outlet 18a is configured to have a smaller opening area than the lower water outlet 18b, so that the discharge flow rate is significantly smaller than that of the lower water outlet 18b. As shown in FIG. 6, the washing water 30 spouted from the first water spout 18 configured in this manner is L-shaped so as to follow the shape of the spout immediately after being projected from the first water spout 18 as shown in FIG. However, as it progresses through the rim portion 14, the shape naturally collapses due to the action of surface tension and the like. However, since the wash water 30 spouted from the upper spout 18a is thinly spouted, it advances along the upper portion of the rim portion 14, and becomes thinner due to the action of centrifugal force, etc. It spreads so that it approaches. This thin-film water film 30a-like spouting prevents the washing water 30 from jumping out of the rim portion 14, so that the washing water 30 can be carried even to the upper edge of the rim portion 14 where much of the washing is left unwashed. can demonstrate their sexuality. The number of times of wiping to remove dirt can be greatly reduced.

Furthermore, in the present invention, the effect of centrifugal force is reduced by the thin film of water 30a to achieve the above effect. devised. Specifically, the lower washing water 30b spouted from the lower spouting port 18b is configured to be spouted in the width direction with a large flow rate, and the lower washing water 30b spouted from the lower spouting port 18b is discharged from the shelf portion 16. It is constructed so that it is gradually dropped into the bowl part 4 from the bottom. This not only suppresses the movement of the lower washing water 30b spouted from the lower spout 18b to the upper portion of the rim portion 14 spouted from the upper spout 18a constituting the thin water film 30a due to surface tension. Since the force falling on the bowl portion 4 acts on the thin film water film 30a in such a manner that the thin film water film 30a counteracts the force of the thin film water film 30a trying to fly out of the rim portion 14 due to the centrifugal force, the thin film water The film 30a does not protrude from the rim portion 14, but stays on the upper edge of the rim portion 14, making it possible to wash the rim portion 14 cleanly.

Further, in this embodiment, the width of the shelf portion 16 is optimally designed so as to ensure that the thin water film 30a is ejected from the rim portion 14 by the lower cleaning water 30b. Specifically, the lateral length of the shelf 16 is designed to be shorter toward the front of the flush toilet 1, and the front end where the greatest centrifugal force acts on the wash water 30 has the largest curvature. The front area, which contains the position, takes the lateral length of the ledge 14 to be zero. As a result, when centrifugal force acts on the cleansing water 30, a force acts so as to compress it toward the shelf 14. Due to this compressive force, the lower cleansing water 30b moves toward the bowl 4 instead of the upper side of the rim 14. It becomes easy to spread, and this force similarly acts as a force to pull down the thin water film 30a toward the bowl portion 4 direction. As a result, even if the rim portion 14 is cleanly washed up to the upper edge, the washing water 30 can be reliably prevented from jumping out of the rim portion 14.例文帳に追加

1 flush toilet
2 skirt part 4 bowl part
6 water channel 8 drainage channel 8a inlet
10 Water storage tank
11 drain valve
12 Dirt receiving surface
14 Rim
14a inner surface
16 shelf
18 First spout 18a Upper spout 18b Lower spout 20 Second spout
22 side set hole
24 first water passage
26 Second water passage
28 Third water passage 30 Washing water 30a Thin film water film 30b Bottom washing water

Claims (5)

A flush toilet in which flush water is supplied from a flush water supply means to wash a bowl portion of the toilet to discharge waste,
a bowl portion having a bowl-shaped waste receiving surface and a rim portion erected in a substantially vertical direction on the inner upper end;
a water storage portion provided at the bottom of the bowl portion, and a drain pipe connection port;
a rim water spout for spouting cleansing water along the inner peripheral surface of the rim;
with
The rim spout constituting the rim water spouting portion has a discharge flow rate of wash water to the upper portion of the rim portion per unit time that is smaller than the discharge flow rate of wash water to the lower portion of the rim portion per unit time. A flush toilet comprising: The rim water spout is configured to supply cleansing water to the rim from a single water spout, and the upper water spout of the rim spout is vertically oriented so as to form a thin film of water on the upper side of the rim. The length in the width direction is longer than the length in the width direction, and the length in the width direction is substantially uniform in the vertical direction. A flush toilet, characterized in that it is constructed so that the flow rate of flush water discharged per unit time from the water port to the lower side of the rim portion is large. A flush toilet, wherein the rim spout comprising the upper spout and the lower spout is L-shaped when viewed from the front. Since the washing water having a large flow rate on the lower side of the rim portion falls to the lower side of the bowl portion, movement toward the washing water side formed by the thin water film on the upper side of the rim portion is suppressed, and the thin film is suppressed. A flush toilet, wherein the shelf is formed so as to oppose the centrifugal force acting on the water film against the force of a large flow of wash water at the bottom of the rim portion dropping downward to the bowl portion. The shelf is configured such that the horizontal shelf width is smaller at a position farther from the rim spout than in the vicinity of the rim spout, and the width of the horizontal shelf is zero at a position farther away. A flush toilet comprising:

Images